Datasheet

4−2
18 × 8 Matrix
8
TUSB2136
P0[7:0]
P1[7:0]
P3.6
P3.7
8
1
1
8
P2[7:0]
Figure 4−2. Keyboard Matrix Scan Connection
C3
R1
R2
R3
R4
R5
V
CC
V
CC
I
2
C
EEPROM
V
CC
V
CC
V
reg
VREN
SUSP
C4
C5
X1 X2
SCL
SDA
PS
PWR OVCR
TUSB2136
C2
VR
TPS76333
C1
5 V
TPS2042
Figure 4−3. Partial Connection Bus Power Mode
3.3 V
1.5 kΩ
D+
D−
DP0
DM0
1.5 kΩ
D+
D−
DP0
DM0
Bus PWR
(5 V)
PUR
(a) (b)
Figure 4−4. Upstream Connection (a) Non-Switching Power Mode (b) Switching Power Mode